Origin and Habitat: Galeana, Nuevo León, Mexico. Acharagma roseanum subsp. galeanense is a range restricted subspecies, it habitar is very disjunct from the habitat of subsp. roseanum.Habitat and Ecology: It grows on rocky limestone hills in xerophytic shrubland. Overgrazing of the habitat by goats is the only threat.

Description:Acharagma roseanum subsp. galeanense is a small clustering cactus with many crowded finger-like stems up to 6-10 centimetres tall, concealed by yellowish-white or rich gold spines (central spines almost indistinguishable from the radials). The flowers are cream-yellow, up to 1.5 centimetres in length and appears at the stem tip.Derivation of specific name:'galeanensis' For the occurrence near Galeana, Nuevo León, Mexico.Habit: Mat-forming. Established plants can reach a height of 15 cm and width of 30 cm.Stem: Pale green, cylindrical, initially erect that became prostrate up to 10 cm tall, 2-2,5 cm in diameter.Ribs: The ribs have tubercles, with ungrooved areole.Spines: About 30 not easily distinguished as centrals end radials, pale yellow, rich gold to dark amber coloured.Flowers: Yellow at the stem tips, small 1 to 2 cm in diameter.

Subspecies, varieties, forms and cultivars of plants belonging to the Acharagma roseanum group

Acharagma roseanum(Boed.) E.F.Anderson: has tiny, soft egg-shaped stems from a thick tap root and will slowly form small clusters with dense golden spines. Flowers are cream to pink with bronze-rose midveins.

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Cultivation and Propagation: Very slow growing. Because of the tap root they are very rot prone, so use highly gritty compost with much drainage and water regularly in summer, but do not overwater, it prefer a completely dry place during winter. An unheated greenhouse would be perfect. It can survive low temperatures (appr. -7°C). Full sun to light shade.Propagation: Easy to propagate from seed or (rarely) cuttings if available.